Barrons SAT Subject Test Chemistry, 13th Edition

(Marvins-Underground-K-12) #1

  1. (B) The oxidation state of an element is zero. The oxidation state of a
    monatomic ion in a compound is the charge of the ion in the compound.
    Therefore, the oxidation state of magnesium in the reactants is 0 and the
    oxidation state of magnesium in the products is +2. Since the oxidation state of
    magnesium is increasing, magnesium is being oxidized.

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